how about those gourmet chocolate covered expresso coffee beans.
I hate drinking coffee, but the choc coffee beans give me the caffeine I need.
1. lightweight, no need to carry a jetboil to make coffee
2. time saving due to forgoing setting up a kitchen
1. you are tempted to eat choc coffee beans before bed time and are up all night.
2. you dont pack them in the right place and they melt.
3. choc covered coffee beans are not a hot food, if you need one.
I also keep an emergency can of red bull on multi-day trips. In case I hit the proverbial WALL, and need the placebo to trick myself to keep on going. Although in the recent past years, my estimates, pace timing and nutrition planning has gotten better, so I don't end up in a "wall" situation, but it still works to get my nephew and other hiking buddies on the move.
I brew green tea at home before a trip, and fill my camelbak. Green tea has less caffeine, so FOR ME, its a slow constant release of caffeine, instead of the spike and crash of alternatives.
Although in my teens and 20s I used to put away 3 liters of Coca Cola per day, just to barely function in school. Those were the bad 'good' ole days when I didn't understand how my body metabolized sugar.